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O2 is one of the UK’s longest established mobile phone networks. Originally known as Cellnet, the company was de-merged from BT in 2002 and was later purchased by the Spanish telecoms giant Telefonica.

O2 is well known for its O2 Priority rewards scheme which offers a range of discounts and other incentives to its customers. These are available to contract and pre-pay customers via the O2 Priority app. Customers can also enjoy early access to tickets for events at the O2 in London and O2 Academy venues across the UK.

O2 also offers the majority of customers access to its network of O2 wifi hotspots across the UK. This offers high-speed internet access in cafés, bars, restaurants and other venues across the UK.

O2 sells its phones and services through the O2 website, a large network of retail stores and phone resellers such as the Carphone Warehouse.

If you’re trying to work out how much it will cost to call any given number if you’re on O2 customer, fret not. We’ve written a wide range of articles that should be able to instruct you on exactly how much you’re going to be paying to call. Find out the O2 call charges below.

How much does it cost to call an 0345 number on O2?

How much does it cost to call an 0843 number on O2?

How much does it cost to call an 0844 number on O2?

How much does it cost to call an 0845 number on O2?

How much does it cost to call an 0330 number on O2?

How much does it cost to call an 0808 number on O2?

How much does it cost to call an 0800 number on O2?

How much does it cost to call an 0333 number on O2?